How to unlock the channel on my Icom IC-M25 Transceiver?
- KKirk KelleyAug 14, 2025
If the displayed channel on your Icom Transceiver cannot be changed, the Lock function is likely activated. To turn it off, hold down [ ] (Hi/Lo) for 1 second.
How to unlock the channel on my Icom IC-M25 Transceiver?
If the displayed channel on your Icom Transceiver cannot be changed, the Lock function is likely activated. To turn it off, hold down [ ] (Hi/Lo) for 1 second.
How to unlock the channel on my Icom Marine Radio?
If you cannot change the displayed channel on your Icom Marine Radio, it's likely that the lock function is activated. To turn it off, hold down the [ ] (Hi/Lo) button for 1 second.
Why is there no sound from my Icom IC-M25 speaker, or why is the sound muffled?
If your Icom Transceiver isn't producing any sound or the sound is muffled, there are several potential causes. First, the squelch level might be set too high; try adjusting it. Also, ensure the volume isn't too low by adjusting the volume level. Check if the Volume Mute function is on and turn it off. Finally, if the speaker has been exposed to water, remove any water from the speaker grill.
What to do if the battery icon blinks, and "Er" and "CHG" are displayed on my Icom IC-M25 Transceiver?
If your Icom Transceiver displays the battery icon blinking along with "Er" and "CHG", it indicates that the battery is either being charged outside the optimal temperature range of 0°C (+32°F) to +45°C (+113°F), or the battery has become too hot, possibly after prolonged transmitting. To solve this, keep the transceiver in a cool place until the internal battery cools down.
Why is transmitting impossible, or high power cannot be selected on my Icom IC-M25 Transceiver?
If you cannot transmit or select high power on your Icom Transceiver, it might be because some channels are limited to low power or are receive-only. Try selecting a different channel. Alternatively, the output power might be set to low; push [Hi/Lo] to select high power. It is also possible that the battery is exhausted, in this case charge the battery.
Why does scan not start on my Icom IC-M25?
If the scan function does not start on your Icom Transceiver, ensure that at least two channels are set as Favorite channels, because only Favorite channels are scanned. Set the desired channels as Favorite channels to resolve this.
How to turn on beep sounds on Icom IC-M25 Transceiver?
If there are no beep sounds on your Icom Transceiver, the Beep Tone function is likely turned off. To turn it on, go to the Set mode and enable the Beep Tone function.
What to do if there is no sound from my Icom Marine Radio speaker?
If you're not getting any sound from your Icom Marine Radio speaker, there could be a few reasons. First, the squelch level might be too high, so try setting it to the threshold level. Alternatively, the volume level could be too low; adjust it to a suitable level. Finally, if the speaker has been exposed to water, remove any water from the speaker grill.
Why can't I transmit or select high power on my Icom Marine Radio?
Battery type | BP-282 |
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Battery life (max) | 11 h |
Battery low indication | Yes |
Number of batteries supported | 1 |
Purpose | Marine Radio Service |
Operating frequency | 156.025 - 157.425 MHz |
Display type | LCD |
USB connector type | Micro-USB B |
Antenna connector type | FA-SC59V |
Product color | Black, White |
Waterproof up to | 1 m |
International Protection (IP) code | IPX7 |
Operating temperature (T-T) | -20 - 60 °C |
Number of batteries included | 1 pc(s) |
Depth | 30.5 mm |
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Width | 56.6 mm |
Height | 134.2 mm |
Weight | 220 g |
The transceiver floats in fresh or salt water, even with accessories attached. May sink with third-party accessories.
Procedure for making a distress call on Channel 16 for assistance, including necessary information.
Guidelines to ensure RF exposure remains within FCC/IC limits for general population use, focusing on antenna placement and usage.
Crucial warnings about connecting to AC, water exposure, and proper antenna attachment for safe operation.
Identification and description of all buttons, connectors, and controls on the transceiver's exterior.
Explanation of the various icons, readouts, and indicators shown on the transceiver's LCD screen.
How to select channel groups, specific channels, Channel 16, Call channel, and weather channels.
Procedures for receiving, transmitting, adjusting volume, squelch, and using the monitor function.
Steps to enter Set mode, navigate through items, and select options using the transceiver controls.
Critical safety warnings regarding battery misuse, damage, extreme temperatures, and exposure to liquids.